Eye mask



FIG. 1 is a front view of an eye mask showing our new design, in an unzipped position;

FIG. 2 is a rear view thereof;

FIG. 3 is another front view thereof, shown in a zipped position; and,

FIG. 4 is a left side view thereof, shown in a folded position.

All surfaces not shown form no part of the claimed design. 

CLAIM The ornamental design for an eye mask, as shown and described. 